Re: [Qemu-devel] [PATCH 0/2][RFC] postcopy migration: Linux char device for postcopy

[Benoit Hudzia]

Yes we plan to release patch as soon as we cleaned up the code and we
get the green light from our company ( and sadly it can take month on
that point..)

On 13 January 2012 01:31, Takuya Yoshikawa
<address@hidden> wrote:
> (2012/01/13 10:09), Benoit Hudzia wrote:
>>
>> Hi,
>>
>> Sorry to jump to hijack the thread  like that , however i would like
>> to just to inform you  that we recently achieve a milestone out of the
>> research project I'm leading. We enhanced KVM in order to deliver
>> post copy live migration using RDMA at kernel level.
>>
>> Few point on the architecture of the system :
>>
>> * RDMA communication engine in kernel ( you can use soft iwarp or soft
>> ROCE if you don't have hardware acceleration, however we also support
>> standard RDMA enabled NIC) .
>> * Naturally Page are transferred with Zerop copy protocol
>> * Leverage the async page fault system.
>> * Pre paging / faulting
>> * No context switch as everything is handled within kernel and using
>> the page fault system.
>> * Hybrid migration ( pre + post copy) available
>> * Rely on an independent Kernel Module
>> * No modification to the KVM kernel Module
>> * Minimal Modification to the Qemu-Kvm code
>> * We plan to add the page prioritization algo in order to optimise the
>> pre paging algo and background transfer
>>
>>
>> You can learn a little bit more and see a demo here:
>> http://tinyurl.com/8xa2bgl
>> I hope to be able to provide more detail on the design soon. As well
>> as more concrete demo of the system ( live migration of VM running
>> large  enterprise apps such as ERP or In memory DB)
>>
>> Note: this is just a step stone as the post copy live migration mainly
>> enable us to validate the architecture design and  code.
>
>
> Do you have any plan to send the patch series of your implementation?
>
>        Takuya



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